Is there an effective DIY grasshopper trap?


Molasses has been shown to be an attractant and feeding stimulant for a couple of species of North American grasshoppers. However, I can find no instances of research, where molasses has been tested as a bait for a grasshopper trap. Instead, scientists have looked at whether or not molasses might be a bait that could be used to deliver insecticides to grasshoppers, by integrating the insecticide into a molasses formulation.

Based upon my reading of the literature, I don't think that molasses would make a good bait for a grasshopper trap. First, since it is an attractant, molasses could potentially attract MORE grasshoppers to a home garden ~ which would be counterproductive for grasshopper control. Second, molasses was less attractive to grasshoppers than fatty-acid based baits. Thus, I could imagine a situation where molasses might be attractive enough to get grasshoppers into an area, but not attractive enough to draw them to a trap. Third, I would be concerned that the molasses might attract small mammals or rodents who might be caught in the trap.

I would defer to the UC IPM guidelines for grasshopper control. In particular, their notation about landscape planning and design, and using a green border as a 'trap crop' seems promising. Individual plants can also be netted for protection, if grasshopper populations are not too high.

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